286 



ARACHNIDA EURYPTERIDA 



CHAP. 



FIG. 162. Eurypterus faclieri, Eichw. Upper Silurian, Rootzikiill, Oesel. Restoration 



of ventral surface ; 1-6, appendages of prosoma ; m, metastoma. Immediately pos- 

 terior to the metastoma is the "median process" of the genital operculum. (After 

 Holm.) 



